Circumference of circle = π × Diameter
= π × 18 cm
= 56.54867 or 56.54 to 1 dp
 
        
             
        
        
        
Answer:
48 cubes
Step-by-step explanation:
step 1
Find the volume of one 1/2 unit cube
The volume of the cube is given by

where
b is the length side of the cube
we have

substitute


step 2
Divide the volume of the prism by the volume of one cube

 
        
             
        
        
        
Your model would equal 50,(20+20)=40 +(5+5)=10 .....40+10=50